header{
  width: 100%;
  margin: 0 auto;
  background-color: black;
  opacity: 0.8;
  color: grey;
  text-align: center;
  position: fixed;
  top: 0px;
  left: 0px;
  z-index: 10;
}
header img{
  width: 150px;

}
nav{
  padding: 5px;
}
nav a{
  color: grey;
  margin-left: 50px;
  text-decoration: none;
}
a:hover{
  color: white;
}
.content{
  width: 70%;
  font-size: 0px;
  text-align: center;
  margin: 50px auto;
  position: relative;
  top: 50px;
  left: 0px;
  /*z-index: 5;*/
}
.content img{
  width: 100%;
}
.text1{
  width: 100%;
  height: 30px;
  font-size: 15px;
  color: white;
  text-align: center;
  line-height: 30px;
  background-color: black;
}
.dian{
  width: 100%;
  margin: 10px auto;
  text-align: center;
}
.dian span{
  width: 3px;
  height: 3px;
  background-color: black;
  border: 3px solid black;
  border-radius: 10px;
  display: inline-block;
  margin-left: 20px;
}
span:hover{
  background-color: white;
}
.content1{
  width: 70%;
  margin: 20px auto;
}
.lunbo{
  width: 30%;
  text-align: center;
  border: 1px solid grey;
  border-radius: 4px;
  box-shadow: 2px;
  position: relative;
  top: 0px;
  left: 0px;
  z-index: 5;
  margin-left: 10px;
  margin-bottom: 10px;
  display: inline-block;
}
.lunbo img{
  width: 100%;
  height: 100px;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
}
.mask{
  width: 100%;
  height: 100px;
  font-size: 15px;
  background-color: black;
  opacity: 0;
  position: absolute;
  top: 0px;
  left: 0px;
  z-index: 6;
  color: white;
}
.text2{
  font-size: 12px;
  width: 100%;
  height: 30px;
  color: grey;
  background-color: white;
  text-align: center;
  line-height: 30px;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
}
.lunbo:hover .text2{
  color: black;
}
.lunbo:hover .mask{
  opacity: 0.8;
}
.yingfen{
  width: 70%;
  color: grey;
  margin: 60px auto;
  margin-bottom: 20px;
  font-size: 15px;
  padding: 10px;
  text-indent: 30px;
  border-top: 1px solid grey;
  border-bottom: 1px solid grey;
}
.hezuoshang{
  width: 70%;
  text-align: center;
  margin: 0px auto;
}
.hezuoshang img{
  width: 40px;
}
footer{
  background-color: rgb(217, 217, 217);
  padding: 5px;
}
.fleft{
  width: 49%;
  float: left;
  text-align: right;
}
.fleft img{
  width: 30px;
}

.fright{
  width: 49%;
  float: right;
  font-size: 12px;
  color: grey;
  border-left: 1px solid grey;
  padding: 5px;
  text-align: left;
}
.fright img{
  width: 100px;
}
ul{
  list-style: none;
  padding-left: 5px;
}
footer:after{
  content: "";
  display: block;
  clear: both;
}
